*{
    margin: 0;
    padding: 0;
}
body{
    background: #ccc url(../images/background.jpg) no-repeat left top;
    background-size: 100%;
}
#school_logo{
    width: 100%;
    height: 50px;
    position: relative;
}
#logo_img{
    width: 450px;
    height: 60px;
    position: absolute;
    top: 50%;
    left: 33%;
}
#login_form{
    border: 1px solid #9acfea;
    width: 340px;
    margin: 100px auto;
    background: #dedede;
    -moz-border-radius: 1em;
    -webkit-border-radius: 1em;
    border-radius: 1em;
    box-shadow: 6px 6px 12px #9acfea;
}
form p{
    font-size: 24px;
    font-family: "宋体";
}
.login{
    width:100%;
    height: 50px;
    line-height: 50px;
}
.login input::-webkit-input-placeholder { /* WebKit browsers */
    color: #ccc;
}
input:-moz-placeholder { /*  Firefox 4 to 18 */
    color: #ccc;
}
input::-moz-placeholder { /*  Firefox 19+ */
    color: #ccc;
}
input:-ms-input-placeholder { /* Internet Explorer 10+ */
    color: #ccc;
}
#check_userName,#check_password{
    font-size: 10px;
    color: red;
}
.login img{
    margin: 16px 10px 0 40px;
    float: left;
}
.login_er{
    margin: 10px 0 0 70px;
}

.login_er label{
    color:#9d9d9d;
    font-family: "宋体";
}
.login_er label.changeColor{
    color: blue;
}
#send{
    width: 100px;
    margin: 20px 120px 30px 120px;
    background-color: #9acfea;
    border: 1px solid #9acfea;
    -moz-border-radius: 0.5em;
    -webkit-border-radius: 0.5em;
    border-radius: 0.5em;
    font-size: 18px;
    font-family: "楷书";
    color: white;
    cursor: pointer;
}